Head closure apparatus for heat exchanger

Details Head closure apparatus for heat exchanger Head closure apparatus for heat exchanger

1988-09-22

1989-07-11

Lazarus, Ira S.

Heat exchange

Covered access opening

165158, F28F 906

Patent

active

048462624

ABSTRACT:
The invention discloses a novel head closure apparatus for shell and tube-type heat exchangers. The disclosed apparatus is substantially resistant to thermal stress cracking in that it has an internal closure chamber configured to withstand and dissipate thermal stresses caused by rapidly changing thermal gradients. The apparatus also provides for full access to the entire interior volume of the head closure and to the entire area of the head closure inner tubesheet surface in order to facilitate maintenance and repairs. The invention also discloses a compact and efficient retaining key apparatus for constraining the end-cover of a cylindrically-shaped head closure member against internal working pressures. The apparatus enables substantial reductions in the masses of the retaining keys, the head closure member, and the end-cover, which results in the head closure apparatus being simpler and more economical to manufacture and maintain.

REFERENCES:
patent: 2237029 (1941-04-01), Fischer
patent: 2296620 (1942-09-01), Tinker
patent: 2298511 (1942-10-01), Rathbun
patent: 2816679 (1957-12-01), Tinker
patent: 2920789 (1960-01-01), Tinker
patent: 3258068 (1966-06-01), Hollister
patent: 3605880 (1971-09-01), Smith
patent: 4325428 (1982-04-01), Schuurman
patent: 4630673 (1986-12-01), Belleli
patent: 4750554 (1988-06-01), Oeij et al.

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